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Extrusion die with an equal-passage spiral cavity for molding magnesium alloy square rods and extrusion method

A technology of extrusion dies and magnesium alloys, applied in the direction of metal extrusion dies, metal extrusion, metal extrusion control equipment, etc., can solve the problems of uneven material structure, limited experimental research, etc., and achieve uniform composition and safety The effect of high coefficient and light equipment

Inactive Publication Date: 2010-07-14
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the different bending radii of the blank during bending forming, the structure of the material at the same radius is not uniform, which limits people's experimental research on magnesium alloys that require the same structure and properties at equal radii.

Method used

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  • Extrusion die with an equal-passage spiral cavity for molding magnesium alloy square rods and extrusion method
  • Extrusion die with an equal-passage spiral cavity for molding magnesium alloy square rods and extrusion method
  • Extrusion die with an equal-passage spiral cavity for molding magnesium alloy square rods and extrusion method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The extrusion die of the magnesium alloy square rod and other channels with a spiral cavity is composed of: a fixed plate 1, the fixed plate is connected and fixed to the lower die 2, and the lower die and the upper die 3 are fixed with positioning pins 4 and Connected together by bolts 5 , the curved surfaces of the opposite end surfaces of the upper mold and the lower mold form a channel 6 , and the middle section of the channel is a spiral channel 9 .

Embodiment 2

[0024] In the above-mentioned extrusion die of magnesium alloy square rod with equal-channel spiral cavity, the channels are formed by connecting the spiral channels with straight channels 7 at both ends and connecting channels 8 with rounded corners.

[0025] The passage is composed of straight passages, rounded connecting passages, spiral passages, rounded connecting passages, and straight passages connected in sequence. The cross-section of the channel is a square of 20 mm × 20 mm, and the corners are rounded by 1 mm.

[0026] The composition of the passage includes: two straight passages, two connecting rounded passages and one spiral passage. The straight channel is located at both ends of the mold, which are the inlet and outlet of the material respectively; the spiral channel is located in the middle of the mold and is the main deformation area of ​​extrusion molding; the rounded connecting channel is located at both ends of the spiral channel, respectively The straigh...

Embodiment 3

[0028] In the above-mentioned extrusion die for magnesium alloy square rods with equal-channel helical cavity, the channel is a right-handed 90° channel or a left-handed 90° channel.

[0029] attached figure 2 The middle arrow 10 indicates the back pressure direction, the arrow 11 indicates the extrusion direction, and the arrow 12 indicates the bad material to be processed.

[0030] When the blank enters from the right end of the channel, it passes through a group of channels in sequence to complete the left-handed 90°rotary extrusion.

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Abstract

The invention relates to an extrusion die with an equal-passage spiral cavity for molding magnesium alloy square rods and an extrusion method. Currently, magnesium alloy rods made through extrusion molding have uneven texture at the positions with equal radius because the bending radii of the blanks are different in the bending process. The extrusion die with the equal-passage spiral cavity for molding the magnesium alloy square rods comprises a fixed plate (1) which is connected and fixed with a lower die (2); the lower die and an upper die (3) are fixed through positioning pins and are connected with each other through bolts (5); the curved surfaces of the opposite end faces of the upper die and the lower die form a passage (6); and a spiral passage(9) is arranged at the middle segment of the passage. The extrusion die is used for producing the magnesium alloy rods through extrusion molding.

Description

Technical field: [0001] The invention relates to a mold and a use method thereof, in particular to an extrusion mold and an extrusion method of an equal-channel spiral cavity used for producing magnesium alloy square cross-section bars. Background technique: [0002] Magnesium alloy has the lightest density among metal structural materials currently used in engineering applications, and is one of the most promising metals in the 21st century. Its outstanding performance has attracted extensive attention from the engineering community. At present, the extrusion molding technology of magnesium alloy rods is a relatively new and increasingly mature technology. Equal channel angle extrusion molding of magnesium alloy rods has the advantages of good forming performance, high precision, simple process, convenient operation, excellent product performance, and wide application. However, due to the different bending radii of the blank during bending forming, the structure of the mat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C25/02B21C23/02B21C31/00
Inventor 于彦东周浩
Owner HARBIN UNIV OF SCI & TECH
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